Elevator appliance.



F. DODGE.

ELEVATOR APPLIANCE.

APPLICATION FILED JUNE 3. 191's.

Patented Mar. 13,1917.

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FRED DODGE, 0F CRIGHTON, LOUISIANA, ASSIGNOBOF ONE-HALF '10 FRED A.GRIFFIN,

1 OF CRICHTON, LOUISIANA.

ELEVATOR APFLIANOE.

Specification of Letters Patent. Patented Mar. 13, 1917.

Application filed June 3, 1916. Serial No. 101,593.

To all whom it may concern:

Be it known that I, FRED DODGE, a citizen of the United States,residinga't Crichton, in the parish of Red River and State of Louisiana,have invented certain new and useful Improvements in Elevator Appliances; and. I dohereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

The present invention relates to improvements in elevator appliances foruse more particularly in raising and lowering sucker rods out of andinto wells; and it consists in constructions, combinations andarrangements herein described and claimed.

In the accompanying drawings forming a part of this application, and inwhichsimilar reference symbols indicate corresponding partsin theseveral views:

Figure l is a front elevational view of an elevator appliance asconstructed in accordance with the present invention.

Fig. 2 is a similar view shown partly in section.

Fig. 3 is an end elevational View of the improved appliance shown partlyin section.

Fig. 1 is an enlarged view of the head;

and

Fig. 5 is a cross sectional view taken on the line 55 in Fig. 2.

Referring more particularly to the drawings, 1 designates a bail whichis adapted to be secured to a hook indicated at 2; such hook beingsupported from the elevator cable.

At 3 is shown a yoke which may be solid or formed in the two piecesshown in the drawings, such pieces including arms 4. and 5 connectedtogether by bolts or other means 6. The yoke is formed with a shank 7shouldered as shown at 8 in Fig. 2and reduced thereabove at 9, where itswivelly engages through an opening in the bail 1. The end of thereduced portion 9 is threaded to receive a pair of lock nuts 10 and 11,the upper nut 10 of which is preferably secured to the portion 9 by akey 12, or other suitable means. A washer 13 is interposed between thelower nut 11 and the bail 1.

The lower ends of the arms 4 and 5 are formed to provide openings orbearings 14: and 15 in which are journaled the trunnions 16 and 17 of ahead 18. The head may be made either solid or in sections, and isprovided with a slot 19 into which is arranged to be received thesquared portion of a sucker rod. The sucker rod is confined in therecess 19 by a latch or trigger 20 pivoted as at 21 in a recess 22,which may open through the edge of the head 18, as shown to advantage inFig. 1 to permit the insertion and removal of the trigger 20 without thenecessity of separating the head section. A notch 23 may or may not beprovided in the wall of the slot 19' opposite the recess 22 to receivethe end of the trigger 20 and form an abutment for the same.

- The trigger is to be actuated from a rod 21 fitted to reciprocate in agroove 25 in the head 18, and connected to the trigger 20 by wire orother link 26. The rod 24: projects beyond the head 18, where it isthreaded to receive a cap nut 27 between which and a shoulder 28 formedin the groove 25 is confined a coilspring 29. The coil spring 29normally acts to project the rod 24' outwardly, thus pulling upon thelink 26 and swinging the trigger 20 to the position shown in Figs. 1 and1, where it extends across the slot 19, confining the sucker'rod inplace therein. When, however, it is desired to release the sucker rodthe cap nut 27 is depressed in opposition to the coil spring 29, whichaction moves the rod 2% and link 26 downwardly to the dotted lineposition shown in Figs. 2 and 1, where the trigger 20 will be withdrawnfrom the slot 19 and into the recess 22, thus leaving the sucker rodfree to escape there from.

The sucker rod may be placed in the slot 19 after swinging the head 18to horizontal position by forcing the squared portion of such sucker rodinwardly against the inclined edge of the trigger 20, such triggeryielding automatically and swinging within the recess 22 to permit theentrance of the sucker rod. After the sucker-rod has passed the trigger20, coil spring 29 will automatically return the same to lockingposition, and the elevator is thereupon put in operation to hoist therod from the well.

After the sucker rod has been hoisted to the well, after which thedetached sections of the sucker rod are removed from the head 18 bytripping the trigger 20, as above de scribed. The elevator is thenoperated to lower the appliance, whereupon the slot 19 in the head 18 isengaged with the uppermost of the remaining sections of the sucker rod,and such sections are subsequently hoisted and detached until the wholeof the rod is removed from the Well.

the purpose of steadying the head 18 in the yoke 4;, it is advantageousto employ some such device as shown in the drawing, and which preferablyconsists of casings 3O threaded into the head 18 and being prohperforated flanges 31 through bly project plungers The plungers haveshoulders 33 for preventing the withdrawal thereof from the casings 30,and such shoulders engage one end each of coil springs 33% fitted insaid casings 30, vhich have a tendency to yielding'ly project theplungers 32, The plungers are adapted to fit sockets 35 in the arms iand 5, as shown in Figs. 1 and 2, where they will securely hold the headin the position shown, but which may be disengaged by applying force tomove the head out of the vertical position.

it is obvious that those skilled in the art may vary the details ofconstruction and arrangements of parts without departing from the spiritof my invention, and therefore I do not wish to be limited to suchfeatures except as may be required by the claim.

I claim:

In an appliance of the character described, the combination of a bail, ayoke swivelly supported in said bail and having bearings and socketsadjacent said bearings, a head comprising disk sections securedtogether, trunnions on said disk sections journalcd in the hearings insaid yoke, said head having a slot therein, a recess to one side of saidslot and a notch in the opposite wall of said slot, a trigger pivotallymount ed in said recess and adapted to swing across said slot with oneend occupying said notch, a spring-pressed rod arranged in operativerelation to said trigger casings fitted in said head, plungers in saidcasing adapted to enter the sockets in said yoke, and spring means foryieldingly projecting said plungers, substantially as described.

In testimony whereof, I aiiix my signature.

FRED DODGE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

